28107652820 has 48 divisors (see below), whose sum is σ = 64437355920. Its totient is φ = 10236036096.

The previous prime is 28107652819. The next prime is 28107652823. The reversal of 28107652820 is 2825670182.

It can be written as a sum of positive squares in 8 ways, for example, as 3575322436 + 24532330384 = 59794^2 + 156628^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28107652823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721475 + ... + 759434.

It is an arithmetic number, because the mean of its divisors is an integer number (1342444915).

Almost surely, 2^28107652820 is an apocalyptic number.

28107652820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28107652820 is an abundant number, since it is smaller than the sum of its proper divisors (36329703100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28107652820 is a wasteful number, since it uses less digits than its factorization.

28107652820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481004 (or 1481002 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 28107652820 in words is "twenty-eight billion, one hundred seven million, six hundred fifty-two thousand, eight hundred twenty".